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Jan. 24, 1956 SCOGNAMILLQ 2,731,920

ROTARY PUMP Filed April 24, 1952 2 Sheets-Sheet 1 j Mm- INVENTOR.

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ATTORNEY Jan. 24, 1956 F, SCOGNAMILLO 2,731,920

ROTARY PUMP Filed April 24, 1952 2 Sheets-Sheet 2 ROTARY PUMP Application April 24, 1952, Serial No. 284,110 7 Claims. (Cl. 103-136) The invention herein disclosed relates to rotary machines of the type disclosed in Frank Scognamillo Rotary Pump Patent No. 2,590,728, issued March 25, 1952, in WhlCh blades, slidingly mounted in slots in a rotor, are controlled as to radial movement in such slots by discs in free floating engagement with the ends of the blades, and having annular flanges engaging inner and outer edge portions of the blades.

The present invention is concerned with such radial control of the blades and aims to provide a simplified, inexpensive, rugged form of construction for such purose. p Special objects of the invention are to provide alternative blade control structures which may be used to meet ditferent requirements, with the same basic pump body construction.

A further special object of the invention is to effect control of the blades with the least possible running friction.

and will following specification.

The drawings accompanying and forming part of the specification illustrate certain present practical embodiments of the invention, but it will be appreciated that the invention may be further modified and changed, all within the true intent and scope of the invention as hereinafter defined and claimed.

Fig. l in the drawings is a broken vertical sectional view of one of the new pumps. In this form the rings or flanges for engagement with inner and outer edges of the blades are integral with the end walls or covers of the pump body;

Fig. 2 is an end view showing internal appear after removal of the cover plate;

Fig. 3 is a view similar to Fig. 1, showing substitute covers applied to the cylindrical pump body, these having wider outer flanges and the blades being notched in their outer corners to receive these widened flanges;

Fig. 4 is a like broken vertical sectional view showing which are entirely flat, and the controlling flanges being carried by free floating rings slidable and rotatable over the inner faces of the covers;

.Fig. 5 is a face view of one of the cover plates in Fig. 1;

Fig. 6 is a broken perspective view of the rotor and shaft;

Fig. 7 is a broken longitudinal sectional view of another embodiment with blade control exercised by stationary hubs on the cover plates and free floating rings guided between the pump body and cover plates;

Fig. 8 is an end view of the last construction with cover plate removed and showing a free ring engaged over outer edges of the blades;

Fig. 9 is a broken central sectional view of another embodiment with blade controlling rings seated in annular grooves in the cover plates;

parts as they Fig. 10 is a vertical sectional detail of one of such cover plates;

Fig. 11 is a broken sectional detail of another modification.

In the several forms of the invention illustrated there rotor 10 mounted on a shaft 11 and ournaIed to rotate eccentrically within a cylindrical pump chamber 12 defined by a cylindrical body member 13 closed at the opposite ends by cover plates 14, 15, carrying bearings 16, 17, for the shaft.

The rotor is slotted radially at 13 to receive the sliding blades 19, the end edges of which are flush with the end faces of the rotor, substantially as indicated in Fig. 1.

the blades seated flush in the rotor.

This one-piece construction of end plates and blade confining rings provides a low-cost, rugged structure with no loose parts, and may be easily manufactured to maintain desired blade clearances with respect to the surrounding and enclosing walls of the casing.

or cylindrical portion of the pump.

Figs. 4 and 5 illustrate a modification in which the indiscs 26 rotating and over the flat inner faces of the cover plates.

These free floating, flange carrying discs or rings may be of bronze or other friction reducing metal and by reason of their self-adjusting action, may have special advantages over the integral forms of construction. In case of wear the rings may be quickly and easily replaced, using the same cover plates.

The interchangeability of the three different kinds of cover plates shown in Figs. 1, 3 and 4, is of advantage for handling different kinds of fluids.

Figs. 7 and 8 illustrate a form of construction like that first shown, substituting free rings 27 for the outer flanges 21 shown in Fig. l, the covers 14c, in this case being counterbored at 28 to accommodate these loose This counterbored construction leaves narrow flanges 29 to seat in the counterbore portions 23 in the ends of the cylindrical body portion of the casing.

Figs. 9 and 10 illustrate a construction in which both outer and inner rings 30 and 31 are seated in annular grooves 32, 33, in the cover plates 14d and 15d.

These rings may be of bronze or the like and may be given a press fit in the mounting grooves so as to become permanent parts of the cover plates and to remain stationary in controlling engagement with the outer and inner edges of the blades. 7

The intermediate body portion of the casing is shown as having suitable inlet and outlet ports 34, 35, opening into the cylindrical chamber at opposite sides of the rotor journaled therein. Y

The flush mounting of the blades in the rotor provides for effective sealing of the ends of the blades, and the ends of the rotor by the flat inner surfaces of the end walls of the casing, where integral as first disclosed, or in the form of washer-like discs separately rotatable over the inner faces of the end walls.

The radial slots in the rotor extend inwardly far enough to intercept the annular recesses in the ends of the rotor, so as to fully expose the inner corners of the blades for engagement by the smaller, inner blade controlling rings or flanges.

Fig. 11 illustrates another modification incorporating the overlapping flange or ring construction of Fig. 3 and the floating sealing ring features of Figs. 7 and 8.

In this particular form the loose sealing rings 36 operate in coextensive annular seats 37 in the body member and end plates and ride in the notches 38 in the ends of the rotor and corresponding notches 39 in the ends of the blades.

In the forms of the invention shown in Figs. 4, 7 and 11, clearance may be provided for the rings 26, 28 and 36, substantially as indicated at 40.

What is claimed is:

l. A rotary machine of the character disclosed comprising a casing having a cylindrical body portion and end walls cooperatively forming a cylindrical pump chamber, a shaft journaled eccentrically in said cylindrical pump chamber, a rotor carried by said shaft in eccentric relation to said cylindrical pump chamber, the cylindrical body portion of the casing having inlet and outlet ports at opposite sides of said rotor, said rotor having radial slots therein, blades slidingly confined in said slots and having the ends of the same flush with the opposite ends of the rotor, said rotor having annular recesses in the ends of the same about the shaft and intercepted by said slots whereby the inner edges of the blades at opposite ends will be exposed in said annular recesses, a first pair of annular members one between each of said end walls and the adjacent end of the rotor and extending into the annular recess at that end of the rotor, said first pair of annular members engaging said opposite ends of the inner edges of the blades, and a second pair of annular members of larger diameter than said first pair, one between each of said end walls and the adjacent end of the rotor, said second pair of annular members engaging the op posite ends of the outer edges of the blades.

2. A rotary machine of the character disclosed comprising a casing having a cylindrical body portion and end walls cooperatively forming a cylindrical pump chamber, a shaft journaled eccentrically in said cylindrical pump chamber, a rotor carried by said shaft in eccentric relation to said cylindrical pump chamber, the cylindrical body portion of the casing having inlet and outlet ports at opposite sides of said rotor, said rotor having radial slots therein, blades slidingly confined in said slots and having the ends of the same flush with the opposite ends of the rotor, said rotor having annular recesses in the ends of the same about the shaft and intercepted by said slots whereby the inner edges of the blades at opposite ends will be exposed in said annular recesses, a first pair of annular members one between each of said end walls and the adjacent end of the rotor and extending into the annu lar recess at that end of the rotor, said first pair of annular members engaging said opposite ends of the inner edges of the blades, and a second pair of annular members of larger diameter than said first pair, one between each of said end walls and the adjacent end of the rotor, said second pair of annular members engaging the opposite ends of the outer edges of the blades, all of said annular members being flanges integral with the end walls, and said cylindrical body portion of the casing being counterbored at opposite ends to receive said annular members of larger diameter.

3. A rotary machine of the character disclosed comprising a casing having a cylindrical body portion and end walls cooperatively forming a cylindrical pump chamber, a shaft journaled eccentrically in said cylindrical pump chamber, a rotor carried by said shaft in eccentric relation to said cylindrical pump chamber, the cylindrical body portion of the casing having inlet and outlet ports at opposite sides of said rotor, said rotor having radial slots therein, blades slidingly confined in said slots and having the ends of the same flush with the opposite ends of the rotor, said rotor having annular recesses in the ends of the same about the shaft and intercepted by said slots whereby the inner edges of the blades at opposite ends will be exposed in said annular recesses, a first pair of annular members one between each of said end walls and the adjacent end of the rotor and extending into the annular recess at that end of the rotor, said first pair of annular members engaging said opposite ends of the inner edges of the blades, and a second pair of annular members of larger diameter than said first pair, one between each of said end walls and the adjacent end of the rotor, said second pair of annular members engaging the opposite ends of the outer edges of the blades, the opposite ends of the outer edges of the blades being notched to receive said annular members of larger diameter.

4. A rotary machine of the character disclosed comprising a casing having a cylindrical body portion and end walls cooperatively forming a cylindrical pump chamber, a shaft journaled eccentrically in said cylindrical pump chamber, a rotor carried by said shaft in eccentric relation to said cylindrical pump chamber, the cylindrical body portion of the casing having inlet and outlet ports at opposite sides of said rotor, said rotor having radial slots therein, blades slidingly confined in said slots and having the ends of the same flush with the opposite ends of the rotor, said rotor having annular recesses in the ends of the same about the shaft and intercepted by said slots whereby the inner edges of the blades at opposite ends will be exposed in said annular recesses, a first pair of annular members one between each of said end walls and the adjacent end of the rotor and extending into the annular recess at that end of the rotor, said first pair of annular members engaging said opposite ends of the inner edges of the blades, and a second pair of annular members of larger diameter than said first pair, one between each of said end walls and the adjacent end of the rotor, said second pair of annular members engaging the opposite ends of the outer edges of the blades, said end walls being flat and smooth at the inside and there being in the casing flat discs for rotative sliding engagement over said flat inner surfaces of said end walls, each of said discs carrying one of said first pair of annular members as an integral flange thereon and also carrying one of said second pair of annular members as an integral flange thereon.

5. A rotary machine of the character disclosed comprising a casing having a cylindrical body portion and end walls cooperatively forming a cylindrical pump chamber, a shaft journaled eccentrically in said cylindrical pump chamber, a rotor carried by said shaft in eccentric relation to said cylindrical pump chamber, the cylindrical body portion of the casing having inlet and outlet ports at opposite sides of said rotor, said rotor having radial slots therein, blades slidingly confined in said slots and having the ends of the same flush with the opposite ends of the rotor, said rotor having annular recesses in the ends of the same about the shaft and intercepted by said slots whereby the inner edges of the blades at opposite ends will be exposed in said annular recesses, a first pair of annular members one between each of said end walls and the adjacent end of the rotor that end of the rotor, said first pair of ends of the inner of annular mempair, one between edges of the blades, and a second pair bers of larger diameter than said first each of said end walls and the adjacent end of the rotor, said second pair of annular members engaging the opposite ends of the outer edges of the blades, said first integral with the end walls and said second pair of annular members being loose rings free to rotate over said opposite ends of the outer edges of the blades.

6. A rotary machine of the character disclosed comprising a casing having a cylindrical body portion and end walls cooperatively forming a cylindrical pump chamher, a shaft journaled eccentrically in said cylindrical pump chamber, a rotor carried by said shaft in eccentric relation to said cylindrical pump chamber, the cylindrical body portion of the casing having inlet and outlet ports at opposite sides of said rotor, said rotor having radial slots therein, blades slidingly confined in said slots and having the ends of the same flush with the opposite ends of the rotor, said rotor having annular recesses in the ends of the same about the shaft and intercepted by said slots whereby the inner edges of the blades at opposite ends will be exposed in said annular recesses, a first pair of annular members one between each of said end walls and the adjacent end of the rotor and extending into the annular recess at that end of the rotor, said first pair of annular members engaging said opposite ends of the inner edges of the blades, and a second pair of annular members of larger diameter than said first pair, one between each of said end walls and the adjacent end of the rotor, said second pair of annular members engaging the opposite ends of the outer edges of the blades, the inner said rings being of a material difierent from the material of said blades.

7. A rotary machine of the character disclosed comprising a casing having a cylindrical body portion and end walls cooperatively forming a cylindrical pump chamber,

rotor, said rotor having annular recesses in the ends of the same about the shaft and intercepted by said slots whereby the inner edges of the blades at opposite ends will be exposed in said annular recesses, a first pair of References Cited in the file of this patent UNITED STATES PATENTS 

